Android Box Xibo software

Hello EE .. I hope someone can help me on this
I got 2 televisions with Android Box connected with XIBO software installed.

It supposed to display a video in loop that I upload in the Xibo server as a 'layout' and I choose the TV and I link that TV to the video I want. my 2 other TV are working actually video is looping nicely.

but two others are not working and I see continuously "Downloading new files" and its stuck there and TV is black no video and I got error saying all the time :

"Could you try to tick the 'Use public storage?' and select the first option under 'Storage Options' it should attempt to download files again, perhaps it won't fail this time. Unfortunately you'll need direct access to the device to make this change.

Also you tried to push new apk (not sure what apk if you already have R57) but this device is not rooted so Xibo doesn't have SuperUser permissions - that's regarding this issue, I guess you already knew that."